SquishyFile Video Upscaler is a free, browser-based tool that increases a video's resolution — turning a soft 480p or 720p clip into a sharp 1080p or 4K file — without installing any software or uploading your file anywhere. Everything runs locally in the browser using WebAssembly and WebGPU.
Unlike most upscaling tools that either lock quality behind a paywall or require a heavy desktop install, SquishyFile processes video entirely client-side and automatically switches between two upscaling engines depending on your source: a genuine AI model for videos up to 720p (best detail reconstruction), and FSR (AMD's FidelityFX Super Resolution shaders) for anything larger, which keeps processing fast without needing a powerful GPU.
Key features:
Upscale to 2x or 4x, covering everything from 1080p to 4K output
Automatic engine selection (AI model vs. FSR) based on source resolution
Before/after slider to compare the result before downloading
Supports MP4, MOV, MKV, AVI and WebM
No file size caps, no watermark, no account or sign-up required
100% free, supported by ads rather than subscriptions
It's built for people who just need a quick, no-install way to sharpen an old recording, a downloaded clip, or a low-res screen capture — a lighter, free alternative to desktop tools like Topaz Video AI or paid cloud upscalers, for anyone who doesn't need studio-grade results and would rather not upload footage to a third-party server or pay for a one-off job.
